Portable derrick.



C. C. BRAYTON.

PORTABLE DERRICK.

APPLICATION FILED JUNE 9. 1915.

1 1 84,4 1 4-, Patented May 23, 1916.

INVENTOR. C. C. BRfiYToN M #W ATTORNEYS.

WITNESS THE COLUMBIA PLANOGRAPH co., WASH\NGTON, D. c.

i AT

COREY C. BRAYTO'N, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE YUBA. CON- STRUCTION COMPANY, A CORPORATION OF CALIFORNIA.

PORTABLE DERRICK.

Specification of Letters Patent.

Patented May 23, 1916.

To all whom it may concern:

Be it known that I, COREY C. BRAYTON, a citizen of the United States, and a resident of the city and county of San Francisco, State of California, have invented certain new and useful Improvements in Portable Derricks, of which the following is a specification.

The invention relates to portable drilling machines.

An object of the invention is to provide a drilling machine having a frame and clerrick of simple and improved construction.

The invention possesses other advantageous features, which, with the foregoing, will be set forth at length in the following description where I shall outline in full that form of the invention which I have selected for illustration in the drawingsaccompany ing and forming part of the present specification.

The drawings illustrate one embodiment of the invention, but it is to be understood that the apparatus may be embodied in other forms without departing from the spirit of the invention, as expressed in the appended claims.

Referring to said drawings: Figure 1 is a side elevation of the portable derrick of my invention, a portion thereof being broken away to reduce the size of the figure. Fig. 2 is a top or plan view of the portable derrick" of my invention, the counterbalancing means being removed.

The portable derrick of my invention comprises a frame formed of two longitudinally disposed sills 3-4, which diverge from each other rearwardly. Secured to the frame intermediate its ends and preferably at about its center is an axle 5 which extends outwardly a considerable distance from the frame. The outer ends of the axle are braced by beams 6 secured to the frame at points in front of the axle. Mounted on the outer ends of the axle are wheels 7 upon which the machine may be readily transported. Secured to the forward end of the frame are the front legs 8 of the derrick,

Copies of this patent may be obtained for five cents each, by addressing the which also includes the rear legs 9 secured to the frame adjacent the rear end, the derrick being braced by guys 12 secured to the upper end of the derrick and to the beams 6 at their outer ends. Arranged between the front legs 8 and pivoted to the frame is a tongue 13 which in its vertical position forms the third point of support for the machine and which in its horizontal position forms a tongue by means of which the machine may be drawn. By providing three points of support the machine rests firmly on the ground regardless of its irregular contour.

I claim:

1. In a drilling machine, a main frame composed of two longitudinally disposed rails, an axle arranged transversely of said frame and projecting a considerable distance from the frame on each side secured thereto intermediate the ends of the frame, ground wheels mounted on the outer ends of said axle, a derrick on said frame comprising front legs and rear legs and a tongue pivoted to the frame and arranged between the front legs and adapted to contact with the ground and support the front end-of the frame.

2. In a drilling machine, a main frame composed of two longitudinally disposed rails, an axle arranged transversely of said frame between the ends, ground wheels mounted on said axle, a derrick on said frame comprising a front leg and rear legs, said front leg being formed in two parts spaced apart and a tongue pivoted to said frame intermediate its ends and disposed partly between the two parts of said front leg, that portion of the tongue lying below its pivotal point serving as a support for the front end of the frame.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 17th day of May, 1915.

In presence of- H. G. PROST.

"Commissioner of Patents,

Washington, I). G." 

